Fix redefinition of aliased elements in arguments.

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index 5ff8ff9d3bdc5b0c6ea14fd404723e1799163995..9c5294a26d5031bdc559572b942388609136d681 100644
--- a/src/liveedit.cc
+++ b/src/liveedit.cc
@@ -53,8 +53,8 @@ void SetElementNonStrict(Handle<JSObject> object,
   // Ignore return value from SetElement. It can only be a failure if there
   // are element setters causing exceptions and the debugger context has none
   // of these.
-  Handle<Object> no_failure;
-  no_failure = JSObject::SetElement(object, index, value, kNonStrictMode);
+  Handle<Object> no_failure =
+      JSObject::SetElement(object, index, value, NONE, kNonStrictMode);
   ASSERT(!no_failure.is_null());
   USE(no_failure);
 }